Pereira, Sérgio Luiz & Baker, Alan J. (2005): Multiple Gene Evidence for Parallel Evolution and Retention of Ancestral Morphological States in the Shanks (Charadriiformes: Scolopacidae). Condor 1073: 514–526. DOI: 10.1650/0010-5422(2005)107[0514:MGEFPE]2.0.CO;2 HTML abstract